Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5194
Number of amino acids:449
Molecular Weight:50893.08 Da
Theoretical pI:8.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)255.57%
Cysteine CYS (C)92%
Glutamic Acid GLU (E)194.23%
Aspartic Acid ASP (D)306.68%
Glycine GLY (G)429.35%
Phynylalanine PHE (F)173.79%
Isoleucine ILE (I)408.91%
Histidine HIS (H)204.45%
Lysine LYS (K)306.68%
Methionine MET (M)184.01%
Leucine LEU (L)204.45%
Asparagine ASN (N)245.35%
Glutamine GLN (Q)122.67%
Proline PRO (P)194.23%
Serine SER (S)235.12%
Arginine ARG (R)245.35%
Threonine THR (T)265.79%
Tryptophan TRP (W)122.67%
Valine VAL (V)235.12%
Tyrosine TYR (Y)163.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2263
HydrogenH3485
NitrogenN639
OxygenO649
SulphurS27

FormulaC2263H3485N639O649S27
Total Number of Atoms:7063


Total number of positively charged residues (ARG + LYS):54
Total number of negatively charged residues (ASP + GLU):49
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    90340
Absorption 0.1% (=1 g/l)    1.775,   assuming all pairs of CYS residues form cystines

Ext. coefficient    89840
Absorption 0.1% (=1 g/l)    1.765,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.55

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.51, 24.05, 18.26]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:72.539
Grand average of hydropathicity (GRAVY):-0.45